<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 1.3.0
 * @filesource
 */
defined('BASEPATH') or exit('No direct script access allowed');

/**
 * ODBC Result Class
 *
 * This class extends the parent result class: CI_DB_result
 *
 * @package CodeIgniter
 * @subpackage Drivers
 * @category Database
 * @author EllisLab Dev Team
 * @link https://codeigniter.com/user_guide/database/
 */
class CI_DB_odbc_result extends CI_DB_result
{

    /**
     * Number of rows in the result set
     *
     * @return int
     */
    public function num_rows()
    {
        if (is_int($this->num_rows)) {
            return $this->num_rows;
        } elseif (($this->num_rows = odbc_num_rows($this->result_id)) !== - 1) {
            return $this->num_rows;
        }
        
        // Work-around for ODBC subdrivers that don't support num_rows()
        if (count($this->result_array) > 0) {
            return $this->num_rows = count($this->result_array);
        } elseif (count($this->result_object) > 0) {
            return $this->num_rows = count($this->result_object);
        }
        
        return $this->num_rows = count($this->result_array());
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Number of fields in the result set
     *
     * @return int
     */
    public function num_fields()
    {
        return odbc_num_fields($this->result_id);
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Fetch Field Names
     *
     * Generates an array of column names
     *
     * @return array
     */
    public function list_fields()
    {
        $field_names = array();
        $num_fields = $this->num_fields();
        
        if ($num_fields > 0) {
            for ($i = 1; $i <= $num_fields; $i ++) {
                $field_names[] = odbc_field_name($this->result_id, $i);
            }
        }
        
        return $field_names;
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Field data
     *
     * Generates an array of objects containing field meta-data
     *
     * @return array
     */
    public function field_data()
    {
        $retval = array();
        for ($i = 0, $odbc_index = 1, $c = $this->num_fields(); $i < $c; $i ++, $odbc_index ++) {
            $retval[$i] = new stdClass();
            $retval[$i]->name = odbc_field_name($this->result_id, $odbc_index);
            $retval[$i]->type = odbc_field_type($this->result_id, $odbc_index);
            $retval[$i]->max_length = odbc_field_len($this->result_id, $odbc_index);
            $retval[$i]->primary_key = 0;
            $retval[$i]->default = '';
        }
        
        return $retval;
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Free the result
     *
     * @return void
     */
    public function free_result()
    {
        if (is_resource($this->result_id)) {
            odbc_free_result($this->result_id);
            $this->result_id = FALSE;
        }
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Result - associative array
     *
     * Returns the result set as an array
     *
     * @return array
     */
    protected function _fetch_assoc()
    {
        return odbc_fetch_array($this->result_id);
    }
    
    // --------------------------------------------------------------------
    
    /**
     * Result - object
     *
     * Returns the result set as an object
     *
     * @param string $class_name            
     * @return object
     */
    protected function _fetch_object($class_name = 'stdClass')
    {
        $row = odbc_fetch_object($this->result_id);
        
        if ($class_name === 'stdClass' or ! $row) {
            return $row;
        }
        
        $class_name = new $class_name();
        foreach ($row as $key => $value) {
            $class_name->$key = $value;
        }
        
        return $class_name;
    }
}

// --------------------------------------------------------------------

if (! function_exists('odbc_fetch_array')) {

    /**
     * ODBC Fetch array
     *
     * Emulates the native odbc_fetch_array() function when
     * it is not available (odbc_fetch_array() requires unixODBC)
     *
     * @param
     *            resource &$result
     * @param int $rownumber            
     * @return array
     */
    function odbc_fetch_array(&$result, $rownumber = 1)
    {
        $rs = array();
        if (! odbc_fetch_into($result, $rs, $rownumber)) {
            return FALSE;
        }
        
        $rs_assoc = array();
        foreach ($rs as $k => $v) {
            $field_name = odbc_field_name($result, $k + 1);
            $rs_assoc[$field_name] = $v;
        }
        
        return $rs_assoc;
    }
}

// --------------------------------------------------------------------

if (! function_exists('odbc_fetch_object')) {

    /**
     * ODBC Fetch object
     *
     * Emulates the native odbc_fetch_object() function when
     * it is not available.
     *
     * @param
     *            resource &$result
     * @param int $rownumber            
     * @return object
     */
    function odbc_fetch_object(&$result, $rownumber = 1)
    {
        $rs = array();
        if (! odbc_fetch_into($result, $rs, $rownumber)) {
            return FALSE;
        }
        
        $rs_object = new stdClass();
        foreach ($rs as $k => $v) {
            $field_name = odbc_field_name($result, $k + 1);
            $rs_object->$field_name = $v;
        }
        
        return $rs_object;
    }
}
